EP1691445A1 - Dual band feed window - Google Patents
Dual band feed window Download PDFInfo
- Publication number
- EP1691445A1 EP1691445A1 EP06100845A EP06100845A EP1691445A1 EP 1691445 A1 EP1691445 A1 EP 1691445A1 EP 06100845 A EP06100845 A EP 06100845A EP 06100845 A EP06100845 A EP 06100845A EP 1691445 A1 EP1691445 A1 EP 1691445A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- feed
- window
- assembly
- insert
- primary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000009977 dual effect Effects 0.000 title description 7
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 238000001746 injection moulding Methods 0.000 claims description 2
- 239000003989 dielectric material Substances 0.000 claims 1
- 230000015556 catabolic process Effects 0.000 description 6
- 238000006731 degradation reaction Methods 0.000 description 6
- 230000002452 interceptive effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
- H01Q19/17—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source comprising two or more radiating elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
- H01Q5/45—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more feeds in association with a common reflecting, diffracting or refracting device
Definitions
- the open end of a, for example, reflector antenna feed assembly is typically protected from environmental fouling and or degradation by a dielectric feed window.
- the feed window surface may be positioned one quarter wavelength or other multiple of the mid-band operating frequency wavelength from a launch edge of the feed.
- Multiple feeds of differing operating frequency bands may be applied to a common main reflector for simultaneous multiple band operation with closely spaced remote signal sources such as equatorial communications, satellites.
- each of the multiple feeds was supplied with a dedicated feed window positioned to optimize performance with the operating frequency of each feed.
- Figure 1 is a schematic isometric external view of an exemplary embodiment of a feed window according of the invention, shown applied to a dual band triple feed LNBF assembly.
- Figure 2 is an isometric schematic exploded close-up end view of a feed window and insert according to the invention.
- Figure 3 is a schematic front view of an insert in position relative to a feed assembly, demonstrating insert aperture alignment with a feed view window.
- Figure 4 is a close-up partial cut-away view of figure 1.
- the present invention is demonstrated with respect to a feed assembly 10 having multiple feed Ka (18.3-20.2 GHz) and Ku (12.2-12.7 GHz) dual band operation.
- Ka 18.3-20.2 GHz
- Ku 12.2-12.7 GHz
- the invention is similarly applicable to any embodiment having at least one primary feed operating in a primary frequency band (here the Ku band feed) and at least one secondary feed operating in a secondary frequency band (here the two Ka band feed(s)).
- the number of feeds and their respective operating frequency bands may be selected as desired, the open end of the feed(s) environmentally sealed by a common feed window.
- a feed window 1 2 having a feed window surface 14 is adapted to environmentally seal open end(s) 16 of multiple feed(s).
- the present feed assembly 10 has three adjacent feeds: two Ka band feed(s) 18 each positioned on either side of a Ku band feed 20. Each of the feeds receives circularly polarized signals.
- the feed window has an impact on the return loss and cross polar performance of the system which is a function of the window thickness, dielectric properties and frequency. For a given window thickness, return loss is poorer at higher frequencies. With a single window, the window thickness is typically minimized to allow optimum performance. Other design considerations such as mechanical strength and manufacturability issues generally limit the minimum thickness to greater than 0.5mm which introduces a significant performance degradation.
- a desired operating frequency band such as the lower Ku band frequency
- the optimum position is generally chosen as that which gives best cross polar performance. Reflections from the window are used to cancel cross polar contributions from other elements of the system. Typically this is optimized by measuring (or simulating) the port to port isolation between the two receive ports and varying the window position until a minimum is found.
- Another technique is to use dual window surfaces, spacing the dual window surfaces apart by approximately one quarter wavelength such that the reflections from the two windows cancel.
- the required tuning of the feed window surface position relative to a launch edge of the feed and or application and spacing of a dual feed window surface would require a compromise between the respective optimum positions calculated for each of the different frequency bands.
- the present invention combines these two techniques so that a single feed window 12 may be applied to multiple feeds operating in different frequency bands.
- the feed window surface 14 is located at an optimized position with respect to a launch edge 22 of the primary feed, here for the Ku band feed 20 which is the lower frequency band.
- an inner window insert 24 is applied with an inner window insert surface 28 spaced away from the feed window surface 14 a distance optimized with respect to the secondary feed, the Ka band feed 18, such as one quarter wavelength of the Ka mid-band frequency.
- the inner window insert surface 28 has an aperture 26 formed in the Ku band feed view window29, as shown in figure 3, such that it has minimal performance impact with respect to the Ku band feed 20.
- the feed window surface 14 is supported spaced away from the feed assembly 10 by a feed, window wall 30.
- the feed window wall 30 has a shoulder 32 that seats and retains the inner window insert 24 at the desired distance from the feed window surface 14.
- the inner window insert surface 28 may be adapted to have multiple levels corresponding to different dampening positions of different frequency bands via formation of a step corresponding to the, for example, Ku band feed view window 29.
- the sidewall of the step may be a significant source.of interfering signal reflections that causes greater signal degradation than accepting the Ku band feed window surface signal reflection without an insert for dampening of reflections from the feed window surface 14.
- a feed window 12 according to the invention presents a single sealing surface 34 against the feed assembly 10.
- the environmental seal along the sealing surface 34 may be further improved by the application of a groove 36 and gasket such as an o-ring (not shown) to the feed assembly 10.
- Retaining tab(s) 38 or the like may be added to the feed window wall 30 to give the feed window 12 a snap-on mounting and retention function.
- the feed window 12 and inner window insert 24 may be cost effectively manufactured with a high level of precision via injection molding.
- the present invention has been demonstrated in detail with respect to a flat feed window surface 14 and flat inner window insert surface 28.
- the feed window surface 14 and a corresponding inner window insert surface 28 may be curved, for example to correspond to a curvature of the main reflector such that the reflected signal rays from the different areas of the antenna main reflector surface are each normal to the respective area of a curved feed window surface 14 and a corresponding curved inner window insert surface 28 according to the invention.
- the single feed window 12 eliminates multiple separate feed window(s) 12 and associated seating surface(s) 34 previously applied to multiple feed reflector antennas.
- the multiple feeds covered by the present single feed window 12 may each operate with different frequency bands with maximized performance for selected feed(s) via application .of the inner window insert 24.
- Aperture(s) 26 may be applied to the inner window insert 24 to prevent the presence of the inner window insert 24 from introducing further signal degradation to feeds operating at frequencies the inner window insert 24 is not positioned to dampen the feed window reflections of.
- the multiple feeds covered by the single feed window 12 according to the invention may be closely spaced together, for narrow signal beam offset applications, without having multiple individual feed window wall(s) 30 interfering with the field views of different adjacent feeds.
- feed assembly 12 feed window 14 feed window surface 16 open end 18 Ka band feed 20 Ku band feed 22 launch edge 24 inner window insert 26 aperture 28 inner window insert surface 29 Ku band feed view window 30 feed window wall 32 shoulder 34 sealing surface 36 groove 38 retaining tab
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Aerials With Secondary Devices (AREA)
- Details Of Aerials (AREA)
Abstract
Description
- This application is a continuation-in-part of United States Patent Application No. 10/906,273 titled "Multiple Beam Feed Assembly", filed 11 February 2005 by Andrew Baird and Neil Wolfenden, owned by Andrew Corporation as is the present application, hereby incorporated by reference in the entirety.
- The open end of a, for example, reflector antenna feed assembly is typically protected from environmental fouling and or degradation by a dielectric feed window. To minimize signal degradation resulting from signal reflections upon the feed window surface, the feed window surface may be positioned one quarter wavelength or other multiple of the mid-band operating frequency wavelength from a launch edge of the feed.
- Multiple feeds of differing operating frequency bands may be applied to a common main reflector for simultaneous multiple band operation with closely spaced remote signal sources such as equatorial communications, satellites. Previously, each of the multiple feeds was supplied with a dedicated feed window positioned to optimize performance with the operating frequency of each feed. Currently, there is a growing demand for multiple feeds of different operating bands aligned with increasingly narrow beam separation angle(s). These narrow beam separation angles make it difficult to array individual feed assemblies and corresponding feed windows that are not interfering with adjacent signal beams.
- The increasing competition for reflector antennas adapted for high volume consumer applications such as VSAT, satellite tv and or internet communications has focused attention on cost reductions resulting from increased materials, manufacturing and service efficiencies. Further, reductions in required assembly operations and the total number of discrete parts are desired.
- Therefore, it is an object of the invention to provide an apparatus that overcomes deficiencies in the prior art.
- The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the general and detailed descriptions of the invention appearing herein, serve to explain the principles of the invention.
- Figure 1 is a schematic isometric external view of an exemplary embodiment of a feed window according of the invention, shown applied to a dual band triple feed LNBF assembly.
- Figure 2 is an isometric schematic exploded close-up end view of a feed window and insert according to the invention.
- Figure 3 is a schematic front view of an insert in position relative to a feed assembly, demonstrating insert aperture alignment with a feed view window.
- Figure 4 is a close-up partial cut-away view of figure 1.
- As shown in figures 1-4, the present invention is demonstrated with respect to a
feed assembly 10 having multiple feed Ka (18.3-20.2 GHz) and Ku (12.2-12.7 GHz) dual band operation. One skilled in the art will recognize that the invention is similarly applicable to any embodiment having at least one primary feed operating in a primary frequency band (here the Ku band feed) and at least one secondary feed operating in a secondary frequency band (here the two Ka band feed(s)). The number of feeds and their respective operating frequency bands may be selected as desired, the open end of the feed(s) environmentally sealed by a common feed window. - A feed window 1 2 having a
feed window surface 14 is adapted to environmentally seal open end(s) 16 of multiple feed(s). As best shown in figure 2, thepresent feed assembly 10 has three adjacent feeds: two Ka band feed(s) 18 each positioned on either side of aKu band feed 20. Each of the feeds receives circularly polarized signals. - The feed window has an impact on the return loss and cross polar performance of the system which is a function of the window thickness, dielectric properties and frequency. For a given window thickness, return loss is poorer at higher frequencies. With a single window, the window thickness is typically minimized to allow optimum performance. Other design considerations such as mechanical strength and manufacturability issues generally limit the minimum thickness to greater than 0.5mm which introduces a significant performance degradation.
- At a desired operating frequency band, such as the lower Ku band frequency, it is possible to tune the window position to optimize return loss and cross polar performance and largely negate performance degradation resulting from the presence of the feed window surface. The optimum position is generally chosen as that which gives best cross polar performance. Reflections from the window are used to cancel cross polar contributions from other elements of the system. Typically this is optimized by measuring (or simulating) the port to port isolation between the two receive ports and varying the window position until a minimum is found.
- Another technique is to use dual window surfaces, spacing the dual window surfaces apart by approximately one quarter wavelength such that the reflections from the two windows cancel. However, for dual band operation, the required tuning of the feed window surface position relative to a launch edge of the feed and or application and spacing of a dual feed window surface would require a compromise between the respective optimum positions calculated for each of the different frequency bands.
- As shown in figure 2, the present invention combines these two techniques so that a
single feed window 12 may be applied to multiple feeds operating in different frequency bands. First, thefeed window surface 14 is located at an optimized position with respect to alaunch edge 22 of the primary feed, here for theKu band feed 20 which is the lower frequency band. Second, aninner window insert 24 is applied with an innerwindow insert surface 28 spaced away from the feed window surface 14 a distance optimized with respect to the secondary feed, theKa band feed 18, such as one quarter wavelength of the Ka mid-band frequency. The innerwindow insert surface 28 has anaperture 26 formed in the Ku band feed view window29, as shown in figure 3, such that it has minimal performance impact with respect to theKu band feed 20. - The
feed window surface 14 is supported spaced away from thefeed assembly 10 by a feed,window wall 30. Thefeed window wall 30 has ashoulder 32 that seats and retains the inner window insert 24 at the desired distance from thefeed window surface 14. - Alternatively, the inner
window insert surface 28 may be adapted to have multiple levels corresponding to different dampening positions of different frequency bands via formation of a step corresponding to the, for example, Ku bandfeed view window 29. However, depending upon the closeness of the beam alignment of the different feeds the sidewall of the step may be a significant source.of interfering signal reflections that causes greater signal degradation than accepting the Ku band feed window surface signal reflection without an insert for dampening of reflections from thefeed window surface 14. - A
feed window 12 according to the invention presents asingle sealing surface 34 against thefeed assembly 10. The environmental seal along thesealing surface 34 may be further improved by the application of agroove 36 and gasket such as an o-ring (not shown) to thefeed assembly 10. Retaining tab(s) 38 or the like may be added to thefeed window wall 30 to give the feed window 12 a snap-on mounting and retention function. - The
feed window 12 andinner window insert 24 may be cost effectively manufactured with a high level of precision via injection molding. - The present invention has been demonstrated in detail with respect to a flat
feed window surface 14 and flat inner window insertsurface 28. Alternatively, thefeed window surface 14 and a corresponding innerwindow insert surface 28 may be curved, for example to correspond to a curvature of the main reflector such that the reflected signal rays from the different areas of the antenna main reflector surface are each normal to the respective area of a curvedfeed window surface 14 and a corresponding curved inner window insertsurface 28 according to the invention. - One skilled in the art will appreciate that the
single feed window 12 according to the present invention eliminates multiple separate feed window(s) 12 and associated seating surface(s) 34 previously applied to multiple feed reflector antennas. The multiple feeds covered by the presentsingle feed window 12 may each operate with different frequency bands with maximized performance for selected feed(s) via application .of the inner window insert 24. Aperture(s) 26 may be applied to the inner window insert 24 to prevent the presence of the inner window insert 24 from introducing further signal degradation to feeds operating at frequencies theinner window insert 24 is not positioned to dampen the feed window reflections of. Further, the multiple feeds covered by thesingle feed window 12 according to the invention may be closely spaced together, for narrow signal beam offset applications, without having multiple individual feed window wall(s) 30 interfering with the field views of different adjacent feeds. - Table of
Parts 10 feed assembly 12 feed window 14 feed window surface 16 open end 18 Ka band feed 20 Ku band feed 22 launch edge 24 inner window insert 26 aperture 28 inner window insert surface 29 Ku band feed view window 30 feed window wall 32 shoulder 34 sealing surface 36 groove 38 retaining tab - Where in the foregoing description reference has been made to ratios, integers, components or modules having known equivalents then such equivalents are herein incorporated as if individually set forth.
- While the present invention has been illustrated by the description of the embodiments thereof, and while the embodiments have been described in considerable detail, it is not the intention of the applicant to restrict or in any way limit the scope of the appended claims to such detail. Additional advantages and modifications will readily appear to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details, representative apparatus, methods, and illustrative examples shown and described. Accordingly, departures may be made from such details without departure from the spirit or scope of applicant's general inventive concept. Further, it is to be appreciated that improvements and/or modifications may be made thereto without departing from the scope or spirit of the present invention as defined by the following claims.
Claims (15)
- A feed window for a feed assembly having at least one primary feed operating at a primary frequency band and at least one secondary feed operating at a secondary frequency band, the feed window comprising:a feed window sealing against the feed assembly, enclosing an open end of the primary feed(s) and the secondary feed(s);the feed window having a feed window surface supported by and spaced away from the feed assembly by a feed window wall;the feed window surface of the feed window generally parallel to a launch edge of the primary feed(s) and the secondary feed(s).
- The assembly of claim 1, further including an inner window insert positioned between the feed window surface and the primary feed and the secondary feed; the inner window insert having an inner window insert surface generally parallel to the feed window surface.
- The assembly of claim 2, wherein the inner window insert surface is positioned a distance from the feed window surface corresponding to a multiple of one of a mid-band operating frequency wavelength of the primary frequency band and a mid-band operating frequency wavelength of the secondary frequency band.
- The assembly of claim 3, wherein the multiple is one eighth wavelength.
- The assembly of claim 1, wherein the launch edge(s) of one of the primary feed and the secondary feed are spaced away from the feed window surface, by a distance corresponding to a multiple of one of a mid-band operating frequency wavelength of the primary frequency band and a second multiple of a mid-band operating frequency wavelength of the secondary frequency band.
- The assembly of claim 3, wherein the multiple is one quarter wavelength.
- The assembly of claim 2, wherein the inner window insert has an insert aperture(s) corresponding to a feed view window of one of the primary feed(s) and the secondary feed(s).
- The assembly of claim 2, wherein the insert is seated against a shoulder formed in the feed window wall.
- The assembly of claim 2, further including a plurality of retaining tabs formed in the feed window wall;
the retaining tabs operating to retain the feed window against the feed assembly. - The assembly of claim 1, wherein the primary frequency band is Ka band and the secondary frequency band is Ku band.
- The assembly of claim 2, wherein the feed window and the inner window insert are each formed by injection molding of a dielectric material.
- The assembly of claim 2, wherein the feed window surface and the inner window insert surface is flat.
- The assembly of claim 2, wherein the feed window surface is curved.
- The assembly of claim 2, wherein the inner window insert surface in the field of view of the primary feed is positioned a distance from the feed window surface corresponding to a multiple of a mid-band operating frequency wavelength of the primary frequency band; and
the insert surface in the field of view of the secondary feed is positioned a distance from the feed window surface corresponding to a multiple of a mid-band operating frequency wavelength of the secondary frequency band;
the areas of the insert surface at different distances from the feed window surface separated from one another by a step in the inner window insert surface. - A feed window for a feed assembly having at least one primary feed operating at a primary frequency band and at least one secondary feed operating at a secondary frequency band, the feed window comprising:a feed window sealing against the feed assembly, enclosing an open end of the primary feed(s) and the secondary feed(s);the feed window having a feed window surface supported by and spaced away from the feed assembly by a feed window wall;the feed window surface of the feed window generally parallel to a launch edge of the primary feed(s) and the secondary feed(s); andan inner window insert seated against a shoulder formed in the feed window wall, positioned between the feed window surface and both of the primary feed and the secondary feed;the inner window insert having an inner window insert surface generally parallel to the feed window surface;the inner window insert having an insert aperture(s) corresponding to a feed view window of one of the primaryfeed(s) and the secondary feed(s).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/906,273 US7280080B2 (en) | 2005-02-11 | 2005-02-11 | Multiple beam feed assembly |
US10/907,322 US7154450B2 (en) | 2005-02-11 | 2005-03-29 | Dual band feed window |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1691445A1 true EP1691445A1 (en) | 2006-08-16 |
EP1691445B1 EP1691445B1 (en) | 2012-04-11 |
Family
ID=36143175
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06100845A Expired - Fee Related EP1691445B1 (en) | 2005-02-11 | 2006-01-25 | Dual band feed window |
Country Status (2)
Country | Link |
---|---|
US (1) | US7154450B2 (en) |
EP (1) | EP1691445B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2930476A1 (en) * | 2014-04-08 | 2015-10-14 | VEGA Grieshaber KG | Protection device for a wave guide and method for producing a protection device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130342412A1 (en) * | 2012-06-20 | 2013-12-26 | Hughes Network Systems, Llc | Antenna feedhorn with one-piece feedcap |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6166704A (en) * | 1999-04-08 | 2000-12-26 | Acer Neweb Corp. | Dual elliptical corrugated feed horn for a receiving antenna |
US20020005806A1 (en) * | 1999-11-02 | 2002-01-17 | Roger Adrian Perrott | Dual band antenna |
US20020008669A1 (en) * | 1999-11-12 | 2002-01-24 | Muhlhauser Nicholas L. | Reflective antenna system with increased focal length |
EP1296411A2 (en) * | 2001-09-21 | 2003-03-26 | Alps Electric Co., Ltd. | Converter for receiving satellite broadcast signals from a plurality of satellites |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5576721A (en) | 1993-03-31 | 1996-11-19 | Space Systems/Loral, Inc. | Composite multi-beam and shaped beam antenna system |
US5625365A (en) * | 1995-03-10 | 1997-04-29 | Trimble Navigation Limited | Dual-frequency microwave radio antenna system |
US5767815A (en) * | 1996-06-20 | 1998-06-16 | Andrew Corporation | Antenna feedhorn with protective window |
US6222495B1 (en) | 2000-02-25 | 2001-04-24 | Channel Master Llc | Multi-beam antenna |
US6535176B2 (en) | 2000-04-07 | 2003-03-18 | Gilat Satellite Networks, Ltd. | Multi-feed reflector antenna |
TW465812U (en) | 2000-05-29 | 2001-11-21 | Acer Neweb Corp | Rotation device of disc-shape antenna |
US6388614B2 (en) | 2000-07-06 | 2002-05-14 | Hughes Electronics Corporation | Antenna aperture cover for antenna pointing an improved antenna pointing method using aperture cover |
US6720933B2 (en) * | 2002-08-22 | 2004-04-13 | Raytheon Company | Dual band satellite communications antenna feed |
US7030831B2 (en) * | 2002-11-14 | 2006-04-18 | Wifi-Plus, Inc. | Multi-polarized feeds for dish antennas |
-
2005
- 2005-03-29 US US10/907,322 patent/US7154450B2/en active Active
-
2006
- 2006-01-25 EP EP06100845A patent/EP1691445B1/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6166704A (en) * | 1999-04-08 | 2000-12-26 | Acer Neweb Corp. | Dual elliptical corrugated feed horn for a receiving antenna |
US20020005806A1 (en) * | 1999-11-02 | 2002-01-17 | Roger Adrian Perrott | Dual band antenna |
US20020008669A1 (en) * | 1999-11-12 | 2002-01-24 | Muhlhauser Nicholas L. | Reflective antenna system with increased focal length |
EP1296411A2 (en) * | 2001-09-21 | 2003-03-26 | Alps Electric Co., Ltd. | Converter for receiving satellite broadcast signals from a plurality of satellites |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2930476A1 (en) * | 2014-04-08 | 2015-10-14 | VEGA Grieshaber KG | Protection device for a wave guide and method for producing a protection device |
EP3076139A1 (en) * | 2014-04-08 | 2016-10-05 | VEGA Grieshaber KG | Protection device for a wave guide and method for producing a protection device |
US10205245B2 (en) | 2014-04-08 | 2019-02-12 | Vega Grieshaber Kg | Protection apparatus for a hollow conductor and method for producing a protection apparatus |
Also Published As
Publication number | Publication date |
---|---|
EP1691445B1 (en) | 2012-04-11 |
US7154450B2 (en) | 2006-12-26 |
US20060181473A1 (en) | 2006-08-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20210151891A1 (en) | Waveguide feed network architecture for wideband, low profile, dual polarized planar horn array antennas | |
CN111989824B (en) | Multi-band base station antenna with radome impact cancellation features | |
US7224320B2 (en) | Small wave-guide radiators for closely spaced feeds on multi-beam antennas | |
CA2261625C (en) | Antenna system | |
US6107897A (en) | Orthogonal mode junction (OMJ) for use in antenna system | |
US9112270B2 (en) | Planar array feed for satellite communications | |
US9112262B2 (en) | Planar array feed for satellite communications | |
US6160520A (en) | Distributed bifocal abbe-sine for wide-angle multi-beam and scanning antenna system | |
US20170117637A1 (en) | Compact waveguide power combiner/divider for dual-polarized antenna elements | |
US20030222733A1 (en) | Tracking feed for multi-band operation | |
CN109923736B (en) | Lens base station antenna with azimuthal beamwidth stabilization | |
US9306295B2 (en) | Multibeam transmitting and receiving antenna with multiple feeds per beam, system of antennas and satellite telecommunication system containing such an antenna | |
US7688268B1 (en) | Multi-band antenna system | |
US7061432B1 (en) | Compact and low profile satellite communication antenna system | |
US6150991A (en) | Electronically scanned cassegrain antenna with full aperture secondary/radome | |
US11462836B2 (en) | Base station antennas having skeletal radio frequency lenses | |
CN104025383A (en) | Reflector antenna including dual band splashplate support | |
US6181293B1 (en) | Reflector based dielectric lens antenna system including bifocal lens | |
US7154450B2 (en) | Dual band feed window | |
US6225964B1 (en) | Dual gridded reflector antenna system | |
KR101508074B1 (en) | Frequency selective surface using patch | |
US11929552B2 (en) | Multi-channel communications antenna | |
US20240063558A1 (en) | Antenna assembly with dielectric isolator and base station antenna | |
Akula et al. | Q/V Band Dual-Beam Dual-Polarization Cassegrain Antenna | |
WO2024155484A1 (en) | Base station antennas having an external access port for receiving interchangeable frequency selective surfaces |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA HR MK YU |
|
17P | Request for examination filed |
Effective date: 20061009 |
|
17Q | First examination report despatched |
Effective date: 20061109 |
|
AKX | Designation fees paid |
Designated state(s): DE ES FR GB |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ASC SIGNAL INTERNATIONAL CORPORATION |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: RAVEN MANUFACTURING LIMITED |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602006028700 Country of ref document: DE Effective date: 20120614 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20130114 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120722 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602006028700 Country of ref document: DE Effective date: 20130114 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: 732E Free format text: REGISTERED BETWEEN 20140508 AND 20140514 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R081 Ref document number: 602006028700 Country of ref document: DE Owner name: RAVEN GROUP LTD., GB Free format text: FORMER OWNER: ANDREW CORP., ORLAND PARK, US Effective date: 20120419 Ref country code: DE Ref legal event code: R081 Ref document number: 602006028700 Country of ref document: DE Owner name: RAVEN GROUP LTD., GB Free format text: FORMER OWNER: RAVEN MANUFACTURING LTD., ACCRINGTON, GB Effective date: 20140514 Ref country code: DE Ref legal event code: R081 Ref document number: 602006028700 Country of ref document: DE Owner name: RAVEN GROUP LTD., GB Free format text: FORMER OWNER: ANDREW CORP., ORLAND PARK, ILL., US Effective date: 20120419 Ref country code: DE Ref legal event code: R081 Ref document number: 602006028700 Country of ref document: DE Owner name: RAVEN GROUP LTD., GB Free format text: FORMER OWNER: RAVEN MANUFACTURING LTD., ACCRINGTON, LANCASHIRE, GB Effective date: 20140514 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: TP Owner name: RAVEN GROUP LIMITED, GB Effective date: 20140528 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 11 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 12 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 13 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20210113 Year of fee payment: 16 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20210113 Year of fee payment: 16 Ref country code: DE Payment date: 20210115 Year of fee payment: 16 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 602006028700 Country of ref document: DE |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20220125 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220125 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220802 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220131 |